using EntKube.Clusters.Domain;
using EntKube.Clusters.Features.SetProvider;
using EntKube.Clusters.Infrastructure;
using EntKube.SharedKernel.Domain;
using FluentAssertions;

namespace EntKube.Clusters.Tests.Features;

public class SetProviderHandlerTests
{
    private readonly SetProviderHandler handler;
    private readonly InMemoryClusterRepository repository;

    public SetProviderHandlerTests()
    {
        repository = new InMemoryClusterRepository();
        handler = new SetProviderHandler(repository);
    }

    [Fact]
    public async Task HandleAsync_SetCleura_StoresProviderOnCluster()
    {
        // Arrange — A cluster is already registered with no provider.
        // The user now wants to link it to their Cleura account.

        KubernetesCluster cluster = KubernetesCluster.Register(
            "cleura-cluster", "https://k8s.cleura.cloud", "kubeconfig", Guid.NewGuid(), "ctx", Guid.NewGuid());

        await repository.AddAsync(cluster);

        SetProviderRequest request = new(cluster.Id, "Cleura", "my-user", "my-password", "Sto2");

        // Act

        Result result = await handler.HandleAsync(request);

        // Assert — The provider and credentials should be persisted on the cluster.

        result.IsSuccess.Should().BeTrue();

        KubernetesCluster? updated = await repository.GetByIdAsync(cluster.Id);
        updated!.Provider.Should().Be(CloudProvider.Cleura);
        updated.ProviderCredentials!.Username.Should().Be("my-user");
        updated.ProviderCredentials.Region.Should().Be("Sto2");
    }

    [Fact]
    public async Task HandleAsync_SetNone_ClearsProvider()
    {
        // Arrange — A cluster currently linked to Cleura. The user wants to unlink it.

        KubernetesCluster cluster = KubernetesCluster.Register(
            "test", "https://k8s.example.com", "kubeconfig", Guid.NewGuid(), "ctx", Guid.NewGuid());

        cluster.SetProvider(CloudProvider.Cleura, new ProviderCredentials("u", "p", "Fra1"));
        await repository.AddAsync(cluster);

        SetProviderRequest request = new(cluster.Id, "None", null, null, null);

        // Act

        Result result = await handler.HandleAsync(request);

        // Assert

        result.IsSuccess.Should().BeTrue();

        KubernetesCluster? updated = await repository.GetByIdAsync(cluster.Id);
        updated!.Provider.Should().Be(CloudProvider.None);
        updated.ProviderCredentials.Should().BeNull();
    }

    [Fact]
    public async Task HandleAsync_ClusterNotFound_ReturnsFailure()
    {
        // Arrange — Non-existent cluster ID.

        SetProviderRequest request = new(Guid.NewGuid(), "Cleura", "u", "p", "Sto2");

        // Act

        Result result = await handler.HandleAsync(request);

        // Assert

        result.IsFailure.Should().BeTrue();
        result.Error.Should().Contain("not found");
    }

    [Fact]
    public async Task HandleAsync_InvalidProvider_ReturnsFailure()
    {
        // Arrange — An unrecognized provider name.

        KubernetesCluster cluster = KubernetesCluster.Register(
            "test", "https://k8s.example.com", "kubeconfig", Guid.NewGuid(), "ctx", Guid.NewGuid());

        await repository.AddAsync(cluster);

        SetProviderRequest request = new(cluster.Id, "UnknownCloud", "u", "p", "eu-west-1");

        // Act

        Result result = await handler.HandleAsync(request);

        // Assert

        result.IsFailure.Should().BeTrue();
        result.Error.Should().Contain("Unsupported provider");
    }
}